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- Question
A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of the emf's is :
Options- A. 3:4
- B. 5:4
- C. 5:1
- D. 3:2
- Correct Answer
- 3:2
ExplanationIn series : E1 + E2 = K(50)
In parallel : E1 - E2 = K(10)
E1 + E2 / E1 - E2 = 5/1
=> E1/E2 = 3/2
The emf's are in the ratio of 3:2.
- 1. Who is known as 'Trimurthy of Carnatic Music'?
Options- A. Muthuswami Dikshitar
- B. Purandardasa
- C. Swami Thirunal
- D. None of these Discuss
- 2. The variety of coal in which the deposit contains recognisable traces of the original plant material is
Options- A. bitumen
- B. anthracite
- C. lignite
- D. peat Discuss
- 3. The transformer that develops the high voltage in a home television is commonly called a...?
Options- A. Tesla coil
- B. Flyback
- C. Yoke
- D. Van de Graaf Discuss
- 4. On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because
Options- A. mercury is a metal
- B. density of mercury is greater than that of water
- C. cohesion of mercury is greater than its adhesion with glass
- D. cohesion of water is greater than its adhesion with glass Discuss
- 5. 'No two electrons in an atom can have the same set of four quantum numbers' is
Options- A. Newton's law
- B. Bohr's law
- C. Aufbau principle
- D. Pauli's exclusion principle Discuss
- 6. What is the wavelength of visible spectrum?
Options- A. 8500 - 9800 angstrom
- B. 7800 - 8000 angstrom
- C. 3900 - 7600 angstrom
- D. 1300 - 3000 angstrom Discuss
- 7. The process that may cause physical weathering or mechanical rupture are
Options- A. abrasion, crystallization, pressure release
- B. abrasion, oxidation, hydrolysis
- C. crystallization, carbonation, thermal insolation
- D. None of the above Discuss
- 8. Which Indian Criketer was given the title 'Tiger'?
Options- A. Sunil Gavaskar
- B. Rahul Dravid
- C. B.S. Bedi
- D. Mansur Ali Khan Pataudi Discuss
- 9. Where is the village of Branston, after which the famous pickle is named?
Options- A. Yorkshire
- B. Lancashire
- C. Staffordshire
- D. Norfolk Discuss
- 10. What is a URL?
Options- A. A computer software program
- B. A type of UFO
- C. The address of a document or "page" on the World Wide Web
- D. An acronym for Uniform Resources Learning Discuss
More questions
Correct Answer: Muthuswami Dikshitar
Explanation:
Three great saint composers - Thyagaraja, Muthuswami Dikshitar and Shyama Sastri are known as the 'Trimurti' of Carnatic music. They were not only contemporaries during the later half of the 18th century and the beginning of the 19th century, but were also, incredibly, born in the same town of Thiruvarur in the Thanjavur district of Tamil Nadu.
Correct Answer: peat
Correct Answer: Flyback
Explanation:
The flyback is usually connected to the system that pulls the electron beam across the screen in one direction to 'paint' a line of the image and then returns in the other direction much faster.
Correct Answer: cohesion of mercury is greater than its adhesion with glass
Correct Answer: Pauli's exclusion principle
Correct Answer: 3900 - 7600 angstrom
Correct Answer: abrasion, crystallization, pressure release
Correct Answer: Mansur Ali Khan Pataudi
Correct Answer: Staffordshire
Explanation:
The village of Branston is in Staffordshire, just south of Burton-on-Trent.
Correct Answer: The address of a document or "page" on the World Wide Web
Explanation:
URL stands for Uniform Resource Locator. It is an address for a specific document found on the Web.
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